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-   -   Speedo help please! (https://67-72chevytrucks.com/vboard/showthread.php?t=557610)

Buzzman 12-24-2012 02:38 PM

Speedo help please!
 
Hey There,
My speedometer continues its quest to drive me insane with its clicking and bouncing around. When I originally got the truck, it was hooked up for cruise with the two cables. Speedo didn't work. So I went with the single cable setup (lubed properly with liquid graphite - it's not the cable). It worked fine for a while, but when the weather turned cold, the clicks began. Tried greasing up the dash end, but that didn't help. So I picked up a used speedo on ebay, hooked it up to the cable without intalling it and it worked fine, but when I actually put it in the dash, the clicking started again. So it's not the cable, and I don't think it's the driven gear in the tranny. That leaves something in the dash - maybe the retainer clip is messing it up? Has anyone encountered a similar problem? Thanks!

notallthere 12-24-2012 03:43 PM

Re: Speedo help please!
 
The original one in mine did the same thing especially in the winter until some oaf decided to take apart the dash and clean it up. I broken the needle off. My replacement was one from an 84 and it is quieter and more stable. It could be just the older ones that get worn out.

HIGHWAY BY THE SEA 12-24-2012 04:01 PM

Re: Speedo help please!
 
When mine did the "jumping" there was no "clicking", but it turned out to be the speedometer. If your replacement one worked for a while and suddenly messed up then I am leaning toward BOTH of your used speedos are bad. The newer one may have worn out shortly after you installed it. Ironically me "new" speedometer came out of a 1976 truck and replaced a 1981 speedo and works great.

Buzzman 12-24-2012 04:18 PM

Re: Speedo help please!
 
Yeah, the "newer" one could have been shot, too. It had 17k on the odometer, so who knows, that might be 217k for all I know. Maybe I'll just spring for an acutal "new" one ($110) from RockAuto.

BsNhusker 12-24-2012 10:05 PM

Re: Speedo help please!
 
Mine has a chirping sound and it bounces till you get above 10 mph and then it just continues to chirp faster as I drive faster when it's cold. Was leaning towards the speedometer myself. Thinking about rebuilding the whole insterment cluster since lmc has that factory looking tach now.
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